The method used is to use a random test design of a fatorial group with 2 factors. First factor is the type of varieties with three levels namely V1: Pioneer 27, V2: Pioneer 21 and V3: Bonanza. The second factor is a type of isolates P. Fluorescens with three levels namely P1: without the application of P. Fluorescens, P2: Isolates P. fluorescens (A) and P3: Isolate of P. Fluorescens (B).
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